One-year-old baby can eat sweet potatoes, sweet potatoes contain dietary fiber, carotene, vitamin A, vitamin B, vitamin C, vitamin E and potassium, iron, copper, tin, calcium and other more than ten kinds of trace elements, high nutritional value, by nutritionists as the most balanced nutritional health food. It contains beta carotene, vitamin E and vitamin C especially. Especially sweet potato is rich in lysine, rice, flour precisely lack of lysine. Sweet potatoes can be mixed with rice and flour to get a more comprehensive protein supplement. Overall nutrition, sweet potatoes can be described as food and vegetables in the best, every 100g of fresh sweet potatoes, containing only 0.2g fat, producing 99 kcal, about one-third of the rice, is a very good low-fat, low-calorie food, sweet potatoes contain a substance similar to estrogen, the protection of the human skin to slow down the aging of a certain role.